Adjusting Pretension

Slacken nut (3) with reversing ratchet (2) of special tool 51 3 300  (consisting of 51 3 301  , 51 3 303  and 51 3 304  ).

Turn the knob (1) on the special tool 51 3 300  to turn the stud (4) and thereby alter the pretension.

Tighten nut (3).

Tightening torque, see 51 33 1AZ in 51 33 POWER WINDOWS, FRONT .

Check adjustment, repeat procedure if necessary.

Fig 1: Turning Knob On Special Tool 51 3 300

Courtesy of BMW OF NORTH AMERICA, INC.

Checking run-in of door window glass:

Door window glass must strike the inside of the seal.

Check adjustment of rear side window  , adjusting if necessary.